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Dowel Pinless Package for Josephson Technology

IP.com Disclosure Number: IPCOM000050418D
Original Publication Date: 1982-Oct-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 3 page(s) / 67K

Publishing Venue

IBM

Related People

Grebe, KR: AUTHOR [+2]

Abstract

A high performance three-dimensional Josephson device package makes use of pinless connectors for pluggability, and cylinders or dowels for making electrical connections around corners. All package parts, with the exception of the dowels, are two-dimensional in nature and have personality on only one side.

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Dowel Pinless Package for Josephson Technology

A high performance three-dimensional Josephson device package makes use of pinless connectors for pluggability, and cylinders or dowels for making electrical connections around corners. All package parts, with the exception of the dowels, are two-dimensional in nature and have personality on only one side.

Figs. 1A, 1B, and 1C show the three essential connecting elements used in the dowel pinless package. In Fig. 1A, the standard C4 contact is shown in which Nb layers 10 and 12 are easily connected by interface metallurgy 14 and solder 16. In Fig. 1B, the same interconnection is used, except that mercury 18 replaces the solder of Fig. 1A.

In Fig. 1C, a dowel 20, of circular cross-section, is used to provide interconnections between the adapter or wiring module 22, the cards 24, and the circuit 26. Signals go around a right angle on transmission lines deposited on a groundplane on a cylinder, such as a cylinder of silicon or quartz. The Nb transmission line 28 is used for a right-angle connection, while the Nb transmission line 30 is used as an "over the top via" which is available for signal transmission between adjacent cards that share a common dowel.

Fig. 2A shows a "book" of cards, each card having personality on only one side. This is a side view of the package including adapters 32 and 33 and wiring module 34 using a plurality of connector dowels 36 and 38. Cards 40 have circuit chips 42 thereon, the dowels being connected to the adapters and wiring modules as illustrated in Fig. 1C. Wiring modules are plugged in through holes in the back side of the adapters 32 and 33, the two adapters being accurately held in position with respect to each other either by external retention hardware or by silicon posts 43...